A student in our school will be immediately sent home if he is found computer games at ni

问题补充：

A student in our school will be immediately sent home if he is found computer games at night.

A. play

B. playing

C. to play

D. played

答案：

A. play

(答案→)B. playing

C. to play

D. played

解析：考查现在分词做宾语补足语：find sb doing发现某人正在做…,现在分词是做宾语补足语，变成被动是sb be found doing，句意：我们学校的学生一经发现在玩电脑游戏就会被送回家。选B。